Initial refactoring of callback macros to make sure all compilers are supported

This commit is contained in:
Rcmaniac25 2016-01-16 14:30:47 -05:00
parent 38364b1952
commit 33f75e0b89
3 changed files with 246 additions and 102 deletions

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@ -82,6 +82,7 @@ SET(FREEGLUT_SRCS
src/fg_init.c
src/fg_init.h
src/fg_internal.h
src/fg_callback_macros.h
src/fg_input_devices.c
src/fg_joystick.c
src/fg_main.c

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@ -0,0 +1,226 @@
/*
* fg_callback_macros.h
*
* The freeglut library callback macro file.
*
* Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
* Written by Pawel W. Olszta, <olszta@sourceforge.net>
* Creation date: Thu Dec 2 1999
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef FREEGLUT_CALLBACK_MACROS_H
#define FREEGLUT_CALLBACK_MACROS_H
#ifndef FREEGLUT_INTERNAL_H
#error "fg_internal.h needs to be included before this header"
#endif
#if 0 /* old. Remove once other testing is complete */
/*
* EXPAND_WCB() is used as:
*
* EXPAND_WCB arg_list
*
* ... where {(arg_list)} is the parameter list.
*
* This will take the arg_list and extend it by one argument, adding
* the argument "userData" to the end of the list.
*
* All additional args are to get around trailing ',', argument counts,
* and not needing a GCC extension to make this work.
*
* Minor modification of:
* http://stackoverflow.com/questions/5355241/generating-function-declaration-using-a-macro-iteration/5355946#5355946
*
* Supports up to five arguments
*/
/* GCC-specific design that doesn't require per-callback defines */
#define PP_HAS_ARGS_IMPL2(_0, _1, _2, _3, _4, _5, N, ...) N
#define PP_HAS_ARGS_SOURCE() \
ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ZERO
#define PP_HAS_ARGS_IMPL(...) \
PP_HAS_ARGS_IMPL2(__VA_ARGS__)
#define PP_HAS_ARGS(...) \
PP_HAS_ARGS_IMPL(NOT_EXIST, ##__VA_ARGS__, PP_HAS_ARGS_SOURCE())
#define EXPAND_WCB_ZERO(x) \
(userData)
#define EXPAND_WCB_ONE_OR_MORE(...) \
(__VA_ARGS__, userData)
#define EXPAND_WCB_DISAMBIGUATE2(has_args, ...) \
EXPAND_WCB_ ## has_args (__VA_ARGS__)
#define EXPAND_WCB_DISAMBIGUATE(has_args, ...) \
EXPAND_WCB_DISAMBIGUATE2(has_args, __VA_ARGS__)
#define EXPAND_WCB(...) \
EXPAND_WCB_DISAMBIGUATE(PP_HAS_ARGS(__VA_ARGS__), __VA_ARGS__)
#endif
/*
* Compiler defines:
* FG_COMPILER_SUPPORTS_GCC_VA_ARGS_HACK: if the compiler supports GCC's varadic macro implementation (AKA, ##__VA_ARGS__)
* FG_COMPILER_SUPPORTS_VA_ARGS: if the compiler supports varadic macros
*/
#ifdef FG_COMPILER_SUPPORTS_GCC_VA_ARGS_HACK
/*
* EXPAND_WCB() is used as:
*
* EXPAND_WCB arg_list
*
* ... where {(arg_list)} is the parameter list.
*
* This will take the arg_list and extend it by one argument, adding
* the argument "userData" to the end of the list.
*
* All additional args are to get around trailing ',', argument counts,
* and not needing a GCC extension to make this work.
*
* Modification of:
* http://stackoverflow.com/questions/5355241/generating-function-declaration-using-a-macro-iteration/5355946#5355946
*
* --------------
*
* GCC-specific design that doesn't require per-callback defines
*
* The naming is terrible... and it's very convuluted and complex, but
* should not require any modification unless additional arguments are to
* be supported.
*
* Supports callbacks up to 5 args (follow the pattern of PP_HAS_ARGS_IMPL2
* and PP_HAS_ARGS_SOURCE to add more)
*
* Edit with care.
*/
#define EXPAND_WCB_UNPARAN(...) __VA_ARGS__
#define PP_HAS_ARGS_IMPL2(_0, _1, _2, _3, _4, _5, N, ...) N
#define PP_HAS_ARGS_SOURCE() ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ZERO
#define PP_HAS_ARGS_IMPL(...) PP_HAS_ARGS_IMPL2( __VA_ARGS__ )
#define PP_HAS_ARGS(...) PP_HAS_ARGS_IMPL( NOT_EXIST, ##__VA_ARGS__, PP_HAS_ARGS_SOURCE() )
#define EXPAND_WCB_ZERO(args, userData) ( userData )
#define EXPAND_WCB_ONE_OR_MORE(args, userData) ( EXPAND_WCB_UNPARAN args, userData )
#define EXPAND_WCB_DISAMBIGUATE(has_args, args, userData) EXPAND_WCB_ ## has_args ( args, userData )
#define EXPAND_WCB_UNWRAP_ARGS2(args, userData) EXPAND_WCB_DISAMBIGUATE( PP_HAS_ARGS args, args, userData )
#define EXPAND_WCB_UNWRAP_ARGS(args) EXPAND_WCB_UNWRAP_ARGS2 args
#define EXPAND_WCB(cbname) EXPAND_WCB_UNWRAP_ARGS
#else
/*
* EXPAND_WCB() is used as:
*
* EXPAND_WCB( cbname )(( arg_list, userData ))
*
* ... where {(arg_list)} is the parameter list and userData is user
* provided data.
*
* This will take the arg_list and extend it by one argument, adding
* the argument "userData" to the end of the list.
*
* In order for this to work, each callback must have a define that
* properly handles the arguments as needed by the callback.
* This callback is in the format of EXPAND_WCB_SUB_<cbname>.
* Helper functions exist for zero to five parameters: EXPAND_WCB_ZERO,
* EXPAND_WCB_ONE, EXPAND_WCB_TWO, EXPAND_WCB_THREE< EXPAND_WCB_FOUR,
* and EXPAND_WCB_FIVE. Each handle the callback argument counts.
*
* An example for the "Entry" callback, where "Entry" is the cbname:
* typedef void (* FGCBEntry )( int );
* typedef void (* FGCBEntryUC)( int, FGCBUserData );
* #define EXPAND_WCB_SUB_Entry(args) EXPAND_WCB_ONE args
*/
#define FG_COMPILER_SUPPORTS_VA_ARGS //XXX (should be compiler defined)
#ifdef FG_COMPILER_SUPPORTS_VA_ARGS
#define EXPAND_WCB_UNPARAN(...) __VA_ARGS__
#define EXPAND_WCB_ONE_OR_MORE(args, userData) ( EXPAND_WCB_UNPARAN args, userData )
#define EXPAND_WCB_ONE(args, userData) EXPAND_WCB_ONE_OR_MORE( args, userData )
#define EXPAND_WCB_TWO(args, userData) EXPAND_WCB_ONE_OR_MORE( args, userData )
#define EXPAND_WCB_THREE(args, userData) EXPAND_WCB_ONE_OR_MORE( args, userData )
#define EXPAND_WCB_FOUR(args, userData) EXPAND_WCB_ONE_OR_MORE( args, userData )
#define EXPAND_WCB_FIVE(args, userData) EXPAND_WCB_ONE_OR_MORE( args, userData )
#else
//TODO
#error "Compiler does not support varadic argument macros"
#endif
#define EXPAND_WCB_ZERO(args, userData) ( userData )
#define EXPAND_WCB(cbname) EXPAND_WCB_SUB_ ## cbname
/*
* Freeglut callbacks type definitions macros
*
* Every time a callback is updated in fg_internal.h is updated, this needs updated
* if argument counts change, new callbacks are added, or callbacks are removed.
*/
#define EXPAND_WCB_SUB_Display(args) EXPAND_WCB_ZERO args
#define EXPAND_WCB_SUB_Reshape(args) EXPAND_WCB_TWO args
#define EXPAND_WCB_SUB_Position(args) EXPAND_WCB_TWO args
#define EXPAND_WCB_SUB_Visibility(args) EXPAND_WCB_ONE args
#define EXPAND_WCB_SUB_Keyboard(args) EXPAND_WCB_THREE args
#define EXPAND_WCB_SUB_KeyboardUp(args) EXPAND_WCB_THREE args
#define EXPAND_WCB_SUB_Special(args) EXPAND_WCB_THREE args
#define EXPAND_WCB_SUB_SpecialUp(args) EXPAND_WCB_THREE args
#define EXPAND_WCB_SUB_Mouse(args) EXPAND_WCB_FOUR args
#define EXPAND_WCB_SUB_MouseWheel(args) EXPAND_WCB_FOUR args
#define EXPAND_WCB_SUB_Motion(args) EXPAND_WCB_TWO args
#define EXPAND_WCB_SUB_Passive(args) EXPAND_WCB_TWO args
#define EXPAND_WCB_SUB_Entry(args) EXPAND_WCB_ONE args
#define EXPAND_WCB_SUB_WindowStatus(args) EXPAND_WCB_ONE args
#define EXPAND_WCB_SUB_Joystick(args) EXPAND_WCB_FOUR args
#define EXPAND_WCB_SUB_OverlayDisplay(args) EXPAND_WCB_ZERO args
#define EXPAND_WCB_SUB_SpaceMotion(args) EXPAND_WCB_THREE args
#define EXPAND_WCB_SUB_SpaceRotation(args) EXPAND_WCB_THREE args
#define EXPAND_WCB_SUB_SpaceButton(args) EXPAND_WCB_TWO args
#define EXPAND_WCB_SUB_Dials(args) EXPAND_WCB_TWO args
#define EXPAND_WCB_SUB_ButtonBox(args) EXPAND_WCB_TWO args
#define EXPAND_WCB_SUB_TabletMotion(args) EXPAND_WCB_TWO args
#define EXPAND_WCB_SUB_TabletButton(args) EXPAND_WCB_FOUR args
#define EXPAND_WCB_SUB_Destroy(args) EXPAND_WCB_ZERO args
#define EXPAND_WCB_SUB_MultiEntry(args) EXPAND_WCB_TWO args
#define EXPAND_WCB_SUB_MultiButton(args) EXPAND_WCB_FIVE args
#define EXPAND_WCB_SUB_MultiMotion(args) EXPAND_WCB_THREE args
#define EXPAND_WCB_SUB_MultiPassive(args) EXPAND_WCB_THREE args
#define EXPAND_WCB_SUB_InitContext(args) EXPAND_WCB_ZERO args
#define EXPAND_WCB_SUB_AppStatus(args) EXPAND_WCB_ONE args
#endif
#endif /* FREEGLUT_CALLBACK_MACROS_H */
/*** END OF FILE ***/

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@ -33,12 +33,14 @@
#endif
#include "fg_version.h"
#include "fg_callback_macros.h"
/* Freeglut is intended to function under all Unix/X11 and Win32 platforms. */
/* XXX: Don't all MS-Windows compilers (except Cygwin) have _WIN32 defined?
* XXX: If so, remove the first set of defined()'s below.
*/
#if !defined(TARGET_HOST_POSIX_X11) && !defined(TARGET_HOST_MS_WINDOWS) && !defined(TARGET_HOST_MAC_OSX) && !defined(TARGET_HOST_SOLARIS)
#if !defined(TARGET_HOST_POSIX_X11) && !defined(TARGET_HOST_MS_WINDOWS) && !defined(TARGET_HOST_MAC_OSX) && !defined(TARGET_HOST_SOLARIS) && \
!defined(TARGET_HOST_ANDROID) && !defined(TARGET_HOST_BLACKBERRY) && !defined(TARGET_HOST_POSIX_WAYLAND)
#if defined(_MSC_VER) || defined(__WATCOMC__) || defined(__MINGW32__) \
|| defined(_WIN32) || defined(_WIN32_WCE) \
|| ( defined(__CYGWIN__) && defined(X_DISPLAY_MISSING) )
@ -215,101 +217,78 @@
/* -- GLOBAL TYPE DEFINITIONS ---------------------------------------------- */
/* Freeglut callbacks type definitions */
/*
* Freeglut callbacks type definitions
*
* If anything here is modified or added, update fg_callback_macros.h functions.
*
* This is not ideal, but freeglut needs to either define minimal compiler specs,
* or update header every time this is changed or updated.
*/
typedef void* FGCBUserData;
typedef void (* FGCBDisplay )( void );
typedef void (* FGCBDisplayUC )( FGCBUserData );
#define EXPAND_WCB_SUB_Display(args, userData) EXPAND_WCB_ZERO(args, userData)
typedef void (* FGCBReshape )( int, int );
typedef void (* FGCBReshapeUC )( int, int, FGCBUserData );
#define EXPAND_WCB_SUB_Reshape(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBPosition )( int, int );
typedef void (* FGCBPositionUC )( int, int, FGCBUserData );
#define EXPAND_WCB_SUB_Position(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBVisibility )( int );
typedef void (* FGCBVisibilityUC )( int, FGCBUserData );
#define EXPAND_WCB_SUB_Visibility(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBKeyboard )( unsigned char, int, int );
typedef void (* FGCBKeyboardUC )( unsigned char, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_Keyboard(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBKeyboardUp )( unsigned char, int, int );
typedef void (* FGCBKeyboardUpUC )( unsigned char, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_KeyboardUp(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBSpecial )( int, int, int );
typedef void (* FGCBSpecialUC )( int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_Special(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBSpecialUp )( int, int, int );
typedef void (* FGCBSpecialUpUC )( int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_SpecialUp(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBMouse )( int, int, int, int );
typedef void (* FGCBMouseUC )( int, int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_Mouse(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBMouseWheel )( int, int, int, int );
typedef void (* FGCBMouseWheelUC )( int, int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_MouseWheel(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBMotion )( int, int );
typedef void (* FGCBMotionUC )( int, int, FGCBUserData );
#define EXPAND_WCB_SUB_Motion(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBPassive )( int, int );
typedef void (* FGCBPassiveUC )( int, int, FGCBUserData );
#define EXPAND_WCB_SUB_Passive(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBEntry )( int );
typedef void (* FGCBEntryUC )( int, FGCBUserData );
#define EXPAND_WCB_SUB_Entry(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBWindowStatus )( int );
typedef void (* FGCBWindowStatusUC )( int, FGCBUserData );
#define EXPAND_WCB_SUB_WindowStatus(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBJoystick )( unsigned int, int, int, int );
typedef void (* FGCBJoystickUC )( unsigned int, int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_Joystick(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBOverlayDisplay )( void );
typedef void (* FGCBOverlayDisplayUC)( FGCBUserData );
#define EXPAND_WCB_SUB_OverlayDisplay(args, userData) EXPAND_WCB_ZERO(args, userData)
typedef void (* FGCBSpaceMotion )( int, int, int );
typedef void (* FGCBSpaceMotionUC )( int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_SpaceMotion(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBSpaceRotation )( int, int, int );
typedef void (* FGCBSpaceRotationUC )( int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_SpaceRotation(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBSpaceButton )( int, int );
typedef void (* FGCBSpaceButtonUC )( int, int, FGCBUserData );
#define EXPAND_WCB_SUB_SpaceButton(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBDials )( int, int );
typedef void (* FGCBDialsUC )( int, int, FGCBUserData );
#define EXPAND_WCB_SUB_Dials(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBButtonBox )( int, int );
typedef void (* FGCBButtonBoxUC )( int, int, FGCBUserData );
#define EXPAND_WCB_SUB_ButtonBox(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBTabletMotion )( int, int );
typedef void (* FGCBTabletMotionUC )( int, int, FGCBUserData );
#define EXPAND_WCB_SUB_TabletMotion(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBTabletButton )( int, int, int, int );
typedef void (* FGCBTabletButtonUC )( int, int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_TabletButton(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBDestroy )( void ); /* Used for both window and menu destroy callbacks */
typedef void (* FGCBDestroyUC )( FGCBUserData );
#define EXPAND_WCB_SUB_Destroy(args, userData) EXPAND_WCB_ZERO(args, userData)
typedef void (* FGCBMultiEntry )( int, int );
typedef void (* FGCBMultiEntryUC )( int, int, FGCBUserData );
#define EXPAND_WCB_SUB_MultiEntry(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBMultiButton )( int, int, int, int, int );
typedef void (* FGCBMultiButtonUC )( int, int, int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_MultiButton(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBMultiMotion )( int, int, int );
typedef void (* FGCBMultiMotionUC )( int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_MultiMotion(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBMultiPassive )( int, int, int );
typedef void (* FGCBMultiPassiveUC )( int, int, int, FGCBUserData );
#define EXPAND_WCB_SUB_MultiPassive(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
typedef void (* FGCBInitContext )( void );
typedef void (* FGCBInitContextUC )( FGCBUserData );
#define EXPAND_WCB_SUB_InitContext(args, userData) EXPAND_WCB_ZERO(args, userData)
typedef void (* FGCBAppStatus )( int );
typedef void (* FGCBAppStatusUC )( int, FGCBUserData );
#define EXPAND_WCB_SUB_AppStatus(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
/* The global callbacks type definitions */
typedef void (* FGCBIdle )( void ); \
@ -647,54 +626,10 @@ do \
#define FETCH_USER_DATA_WCB(window,cbname) \
((window).CallbackDatas[WCB_ ## cbname])
#if 0
/*
* EXPAND_WCB() is used as:
*
* EXPAND_WCB arg_list
*
* ... where {(arg_list)} is the parameter list.
*
* This will take the arg_list and extend it by one argument, adding
* the argument "userData" to the end of the list.
*
* All additional args are to get around trailing ',', argument counts,
* and not needing a GCC extension to make this work.
*
* Minor modification of:
* http://stackoverflow.com/questions/5355241/generating-function-declaration-using-a-macro-iteration/5355946#5355946
*
* Supports up to five arguments
*/
/* GCC-specific design that doesn't require per-callback defines */
#define PP_HAS_ARGS_IMPL2(_0, _1, _2, _3, _4, _5, N, ...) N
#define PP_HAS_ARGS_SOURCE() \
ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ZERO
#define PP_HAS_ARGS_IMPL(...) \
PP_HAS_ARGS_IMPL2(__VA_ARGS__)
#define PP_HAS_ARGS(...) \
PP_HAS_ARGS_IMPL(NOT_EXIST, ##__VA_ARGS__, PP_HAS_ARGS_SOURCE())
#define EXPAND_WCB_ZERO(x) \
(userData)
#define EXPAND_WCB_ONE_OR_MORE(...) \
(__VA_ARGS__, userData)
#define EXPAND_WCB_DISAMBIGUATE2(has_args, ...) \
EXPAND_WCB_ ## has_args (__VA_ARGS__)
#define EXPAND_WCB_DISAMBIGUATE(has_args, ...) \
EXPAND_WCB_DISAMBIGUATE2(has_args, __VA_ARGS__)
#define EXPAND_WCB(...) \
EXPAND_WCB_DISAMBIGUATE(PP_HAS_ARGS(__VA_ARGS__), __VA_ARGS__)
#else
/*
* EXPAND_WCB() is used as:
*
* EXPAND_WCB( cbname )( arg_list, userData )
* EXPAND_WCB( cbname )(( arg_list, userData ))
*
* ... where {(arg_list)} is the parameter list and userData is user
* provided data.
@ -702,30 +637,12 @@ do \
* This will take the arg_list and extend it by one argument, adding
* the argument "userData" to the end of the list.
*
* In order for this to work, each callback must have a define that
* properly handles the arguments as needed by the callback.
* This callback is in the format of EXPAND_WCB_SUB_<cbname>.
* Two helper defines exist: EXPAND_WCB_ZERO and EXPAND_WCB_ONE_OR_MORE,
* each to handle callbacks that take zero-params (but take userData) and
* to take one or more params (along with userData).
*
* An example for the "Entry" callback, where "Entry" is the cbname:
* typedef void (* FGCBEntry )( int );
* typedef void (* FGCBEntryUC)( int, FGCBUserData );
* #define EXPAND_WCB_SUB_Entry(args, userData) EXPAND_WCB_ONE_OR_MORE(args, userData)
* All of this is defined in fg_callback_macros.h
*
* See that header for more info.
*
* ------------------------------------------------------------------
*/
#define FG_COMPILER_SUPPORTS_VA_ARGS
#ifdef FG_COMPILER_SUPPORTS_VA_ARGS
#define EXPAND_WCB_UNPARAN(...) __VA_ARGS__
#else
#error "Compiler does not support varadic argument macros"
#endif
#define EXPAND_WCB_ZERO(args, userData) ( userData )
#define EXPAND_WCB_ONE_OR_MORE(args, userData) ( EXPAND_WCB_UNPARAN args, userData )
#define EXPAND_WCB(cbname) EXPAND_WCB_SUB_ ## cbname
#endif
/*
* INVOKE_WCB() is used as:
@ -756,7 +673,7 @@ do \
FGCB ## cbname ## UC func = (FGCB ## cbname ## UC)(FETCH_WCB( window, cbname )); \
FGCBUserData userData = FETCH_USER_DATA_WCB( window, cbname ); \
fgSetWindow( &window ); \
func EXPAND_WCB( cbname )( arg_list, userData ); \
func EXPAND_WCB( cbname )(( arg_list, userData )); \
} \
} while( 0 )
#else
@ -767,7 +684,7 @@ do \
{ \
fgSetWindow( &window ); \
FGCBUserData userData = FETCH_USER_DATA_WCB( window, cbname ); \
((FGCB ## cbname ## UC)FETCH_WCB( window, cbname )) EXPAND_WCB( cbname )( arg_list, userData ); \
((FGCB ## cbname ## UC)FETCH_WCB( window, cbname )) EXPAND_WCB( cbname )(( arg_list, userData )); \
} \
} while( 0 )
#endif